Metric Bolts - Tightening Torques - The Engineering ToolBox

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Metric Bolts - Tightening Torques

Recommended thightening torque metric bolts.

Maximum recommended tightening torque for coarse threaded metric steel bolts:

Metric Bolts - Typical Tightening Torques

Size(mm)	Max. Tightening Torque (Nm)
	Property Class
	Grade 8.8	Grade 9.8	Grade 10.9	Grade 12.9
M5	7.0	7.8	10.0	11.7
M6	11.8	13.3	17.0	19.9
M8	28.8	32.3	41.3	48.3
M10	57.3	64.1	81.8	95.7
M12	99.8	112	143	167
M16	248	277	354	413
M20	500	690	809
M24	865	1195	1395
M30	1719	2377	2774

• coarse threaded
• lightly oiled threads
• tension 85% of proof load
• Bolt Torque Calculator
• US Bolts - Tightening Torques

• Reduced Torque with Lubricated Bolts

Related Topics

• Fasteners

  Bolts, nuts and threaded rods - torque, tension and loads.

Related Documents

• Bolt Torque Calculator

  Calculate required bolt torque.

• Improvised Torque Wrench

  Improvise a torque wrench with a luggage scale.

• ISO 724 - Metric Threads

  Dimensions of metric threads according ISO 724.

• Metric Bolt Heads and Wrench Sizes

  ANSI/SO, DIN and JIS bolts.

• Metric Bolts - Minimum Ultimate Tensile and Proof Loads

  Minimum ultimate tensile and proof loads for metric bolts with coarse or fine threads.

• Metric Nuts - Proof Loads

  Proof loads of metric nuts - coarse and fine threads.

• Metric Steel Bolts - Grades and Property Classes

  Metric steel bolts, screws and studs - proof and tensile strength.

• Reduced Torque with Lubricated Bolts

  Lubrication effect on bolt tension and torque.

• Threaded Bolts - Stress Area

  Threaded bolts tensile stress area.

• Threaded Rods - Loads in Imperial Units

  Weight rating of threaded hanger rods.

• US Bolts - Tightening Torques

  Recommended bolt torques.

• Whitworth Bolt Torques

  Torque specifications Whitworth bolts.

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